https://community.appian.com/discussions/f/general/26289/updatedictonarythis is the save into code what might be the issue hereen-USTelligent Community 12https://community.appian.com/thread/103173?ContentTypeID=1Wed, 19 Oct 2022 13:17:17 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:f5007869-9adf-4fcb-85a4-668da5f09bd8Dimitris Soulovaris<p>What is the structure of your dictionary? Did you initialize it before you passed it as a rule input? It must have a value/structure in order to update it.</p> <p><img src="/resized-image/__size/640x480/__key/communityserver-discussions-components-files/11/pastedimage1666185452450v2.png" alt=" " /></p><div style="clear:both;"></div>https://community.appian.com/thread/103172?ContentTypeID=1Wed, 19 Oct 2022 13:12:05 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:3deb87d6-dada-47c0-bf96-afd751d57333Stefan Helzle<p>The error message says &quot;Received null input for dictionary&quot;. So your rule input seems to be null.</p><div style="clear:both;"></div>